package com.miaoshaproject.controller;

import com.alibaba.druid.util.StringUtils;
import com.miaoshaproject.controller.viewobject.UserVO;
import com.miaoshaproject.error.BusinessException;
import com.miaoshaproject.error.EmBussinessError;
import com.miaoshaproject.response.CommonReturnType;
import com.miaoshaproject.service.UserService;
import com.miaoshaproject.service.model.UserModel;
import org.apache.tomcat.util.security.MD5Encoder;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import sun.misc.BASE64Encoder;

import javax.servlet.http.HttpServletRequest;
import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;

@Controller
@RequestMapping(value = "/user")
@CrossOrigin(allowCredentials = "true",allowedHeaders = "*")
public class UserController extends BaseController {
    @Autowired
    private UserService userService;
    @Autowired
    private HttpServletRequest httpServletRequest;
    // 用户登录接口
    @RequestMapping(value = "/login",method = {RequestMethod.POST},consumes = {"application/x-www-form-urlencoded"})
    @ResponseBody
    public CommonReturnType login(@RequestParam(name="telphone")String telphone,
                                  @RequestParam(name="password")String password) throws BusinessException, UnsupportedEncodingException, NoSuchAlgorithmException {
        // 入参校验
        if(StringUtils.isEmpty(telphone)||StringUtils.isEmpty(password)){
            throw new BusinessException(EmBussinessError.PARAMETER_VALIDATION_ERROR);
        }
        // 用户登录服务 用来校验用户登录是否合法
        UserModel userModel = userService.validateLogin(telphone,this.EncodeByMd5(password));
        // 将登录凭证加入到用户登录成功的Session内----单点登录
        this.httpServletRequest.getSession().setAttribute("IS_LOGIN",true);
        this.httpServletRequest.getSession().setAttribute("LOGIN_USER",userModel);
        return CommonReturnType.create(null);
    }


    // 用户注册接口
    @RequestMapping(value = "/register",method = {RequestMethod.POST},consumes = {"application/x-www-form-urlencoded"})
    @ResponseBody
    public CommonReturnType register(@RequestParam(name="telphone") String telphone,
                                     @RequestParam(name="otpCode") String otpCode,
                                     @RequestParam(name="name") String name,
                                     @RequestParam(name="gender") String gender,
                                     @RequestParam(name="age") String age,
                                    @RequestParam(name="password") String password) throws BusinessException, UnsupportedEncodingException, NoSuchAlgorithmException {
        // 验证手机号与对应的otpcode相符合
        String inSessionOtpCode = (String) this.httpServletRequest.getSession().getAttribute(telphone);
        if(!StringUtils.equals(otpCode,inSessionOtpCode)){
            throw new BusinessException(EmBussinessError.PARAMETER_VALIDATION_ERROR,"短信验证码不符合");
        }
        // 用户注册流程
        UserModel userModel = new UserModel();
        userModel.setName(name);
        userModel.setGender(Byte.valueOf(gender));
        userModel.setAge(Integer.valueOf(age));
        userModel.setTelphone(telphone);
        userModel.setRegisterMode("byphone");
        userModel.setEncrptPassword(this.EncodeByMd5(password));

        userService.register(userModel);
        return CommonReturnType.create(null);
    }
    public String EncodeByMd5(String str) throws NoSuchAlgorithmException, UnsupportedEncodingException {
        // 确定计算方法
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        BASE64Encoder base64en = new BASE64Encoder();
        // 加密字符串
        String newstr = base64en.encode(md5.digest(str.getBytes("utf-8")));
        return newstr;
    }


    // 用户获取otp短信接口
    @RequestMapping(value = "/getotp",method = {RequestMethod.POST},consumes = {"application/x-www-form-urlencoded"})
    @ResponseBody
    public CommonReturnType getOtp(@RequestParam(name="telphone") String telphone){
        // 按照一定的规则生成OTP验证码
        Random random = new Random();
        // 【0,99999）------->[10000,10999）
        int randomInt = random.nextInt(99999);
        randomInt+=10000;
        String otpCode = String.valueOf(randomInt);
        // 将OTP验证码同对应的手机号关联,使用httpsession的方式绑定他的手机号与OTPCODE
        httpServletRequest.getSession().setAttribute(telphone,otpCode);
        // 将OTP验证码通过短信通道发送给用户,省略
        System.out.println("telphone="+telphone +"&otpCode="+otpCode);
        return CommonReturnType.create(null);
    }

    @RequestMapping("/get")
    @ResponseBody
    public CommonReturnType getUser(@RequestParam(name="id")Integer id) throws BusinessException {
        // 调用service服务获取对应id的用户对象并返回给前端
        UserModel userModel = userService.getUserById(id);
        // 若获取的对应用户信息不存在
        if(userModel==null){
            throw new BusinessException(EmBussinessError.USER_NOT_EXIST);
        }

        // 将核心领域模型用户对象转换为可供UI使用的viewobject
        UserVO userVO = convertFromModel(userModel);
        // 返回通用对象
        return CommonReturnType.create(userVO);
    }

    private UserVO convertFromModel(UserModel userModel){
        if(userModel == null){
            return null;
        }
        UserVO userVO = new UserVO();
        BeanUtils.copyProperties(userModel,userVO);
        return userVO;

    }

}

